16
BTFS 24
Air intake
The load loss of each 90° wide radius (R=D)
air intake
el-
bow is equivalent to a 1 meter long pipe.
The load loss of each 90° narrow radius
air intake
elbow is
equivalent to a 1.5 meter long pipe.
The load loss of the air intake terminal is not to be taken
into account
Flue gas discharge
The load loss of each 90° wide radius (R=D)
flue gas
elbow
is equivalent to a 1.5 meter long pipe.
The load loss of each 90° narrow radius
flue gas
elbow is
equivalent to a 3.5 meter long pipe.
Air intake pipe must be at least 1 meter long. Install the air-
intake anti-pulse terminal included in the split pipe stan-
dard kit which contains a Ø 51 air intake diaphragm and
install the standard air intake deflector.
Pipe length (m.)
Flue gas discharge
diaphragm diameter (mm)
1 < L < 14
Ø 45
14 < L < 21
Ø 49
21 < L < 28
No diaphragm required
BTFS 28
Air intake
The load loss of each 90° wide radius (R=D) air intake el-
bow is equivalent to a 1 meter long pipe.
The load loss of each 90° narrow radius air intake elbow is
equivalent to a 1.5 meter long pipe.
The load loss of the air intake terminal is not to be taken
into account.
Flue gas discharge
The load loss of each 90° wide radius (R=D)
flue gas
elbow
is equivalent to a 2 meter long pipe.
The load loss of each 90° narrow radius
flue gas
elbow is
equivalent to a 4 meter long pipe.
Air intake pipe must be at least 1 meter long. Install the air
intake anti-pulse terminal included in the split pipe stan-
dard kit which contains a Ø 51 air intake diaphragm and
install the standard air intake deflector.
Pipe length (m.)
Flue gas discharge
diaphragm diameter (mm)
1 < L < 11
Ø 49
11 < L < 21
No diaphragm required
BTFS 32
Air intake
The load loss of each 90° wide radius (R=D)
air intake
el-
bow is equivalent to a 1.5 meter long pipe.
The load loss of each 90° narrow radius
air intake
elbow is
equivalent to a 2 meter long pipe.
The load loss of the air intake terminal is not to be taken
into account
Flue gas discharge
The load loss of each 90° wide radius (R=D)
flue gas
elbow
is equivalent to a 2 meter long pipe.
The load loss of each 90° narrow radius
flue gas
elbow is
equivalent to a 5 meter long pipe.
Air intake pipe must be at least 1 meter long. Install the air
intake anti-pulse terminal included in the split pipe stan-
dard kit and install the standard air intake deflector.
Do NOT install the Ø 51 air intake diaphragm.
Pipe length (m.)
Flue gas discharge
diaphragm diameter (mm)
1 < L < 10
Ø 49
10 < L < 14
Ø 51
14 < L < 22
No diaphragm required
3.2.10. 80 mm diameter flue gas discharge
system
B22 installation type
BTFS 24
The load loss of each 90° wide radius (R=D)
flue gas
elbow is equivalent to a 1.5 meter long pipe.
The load loss of each 90° narrow radius
flue gas
el-
bow is equivalent to a 3.5 meter long pipe.
Flue gas discharge pipe must be at least 0.5 meter
long. Install the air intake anti-pulse terminal included
in the split pipe standard kit which contains a Ø 51
air intake diaphragm and install the standard air in-
take deflector (pic. 8).
Pipe length (m.)
Flue gas discharge
diaphragm diameter (mm)
0.5 < L < 8
Ø 45
8 < L < 14
Ø 49
14 < L < 19
No diaphragm required
Sealing
cap
Flue gas
diaphragm
Air intake
deflector
pic. 8
Protective grille
Air intake
diaphragm Ø 51
Anti-pulse device
